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U0140 2012 Nissan Sentra Code - Lost Communication With Body Control Module

Quick Answer

The U0140 diagnostic trouble code (DTC) for a 2012 Nissan Sentra indicates that there is a communication problem between the vehicle's engine control module (ECM) and the body control module (BCM). Common causes include Faulty wiring or connectors, Malfunctioning body control module (BCM), Malfunctioning engine control module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U0140 2012 Nissan Sentra indicates Lost Communication With Body Control Module.
Common causes
Common causes include Faulty wiring or connectors, Malfunctioning body control module (BCM), Malfunctioning engine control module (ECM).
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code U0140 2012 Nissan Sentra Description

The U0140 diagnostic trouble code (DTC) for a 2012 Nissan Sentra indicates that there is a communication problem between the vehicle's engine control module (ECM) and the body control module (BCM). The body control module is responsible for managing various functions related to the vehicle's body, such as lighting, power windows, door locks, and other accessories. When communication is lost between the ECM and BCM, it can lead to issues with the proper functioning of these systems.

OBDII Code U0140 2012 Nissan Sentra - Lost Communication With Body Control Module
U0140 2012 Nissan Sentra Code - Lost Communication With Body Control Module

Common Causes of U0140 2012 Nissan Sentra

  1. Faulty wiring or connectors
  2. Malfunctioning body control module (BCM)
  3. Malfunctioning engine control module (ECM)
  4. Software glitches or programming issues

Symptoms of U0140 2012 Nissan Sentra

  1. Interior and exterior lights not functioning properly
  2. Power windows and door locks not working
  3. Alarm system malfunctions
  4. Intermittent stalling or failure to start

How to Fix U0140 2012 Nissan Sentra

  1. Begin by conducting a thorough inspection of the wiring and connectors between the ECM and BCM to check for any visible damage or corrosion.
  2. Use a diagnostic scanner to retrieve the specific trouble codes and data related to the communication failure.
  3. Test the body control module and engine control module for proper functionality, replacing any faulty components as needed.
  4. Clear the trouble codes from the vehicle's computer system and perform a test drive to ensure that the communication issue has been resolved.
  5. If the problem persists, consult a professional mechanic or dealership for further diagnosis and repair.

Cost to Fix U0140 2012 Nissan Sentra

The typical repair costs for addressing a U0140 code on a 2012 Nissan Sentra can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to obtain quotes from multiple sources to get a more accurate estimate for this repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0140 2012 Nissan Sentra Code

1. What does the OBDII code U0140 on a 2012 Nissan Sentra mean?

- The code U0140 indicates a communication problem between the vehicle's powertrain control module (PCM) and the body control module (BCM).

2. What are some common symptoms of U0140 on a 2012 Nissan Sentra?

- Common symptoms include intermittent or complete loss of power windows, door locks, interior lights, and other body control functions.

3. What are the possible causes of the U0140 code on a 2012 Nissan Sentra?

- The U0140 code can be triggered by issues such as a faulty body control module, damaged wiring, loose connections, or a malfunctioning PCM.

4. How can I diagnose the U0140 code on my 2012 Nissan Sentra?

- Diagnosing the U0140 code typically involves using a diagnostic scanner to retrieve the specific error codes and testing the communication between the PCM and BCM.

5. Can I still drive my 2012 Nissan Sentra with the U0140 code?

- It is not recommended to drive the vehicle with the U0140 code active, as it can affect critical functions controlled by the body control module.

6. How can I repair the U0140 code on my 2012 Nissan Sentra?

- Repairing the U0140 code may involve inspecting and repairing any damaged wiring, checking and resetting connections, or replacing the body control module if necessary.

7. Can a DIY enthusiast fix the U0140 code on a 2012 Nissan Sentra?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the U0140 code may require professional tools and expertise.

8. Are there any recalls related to the U0140 code on the 2012 Nissan Sentra?

- It is advisable to check with Nissan or the National Highway Traffic Safety Administration (NHTSA) for any recalls related to the U0140 code on the 2012 Sentra.

9. How much does it cost to repair the U0140 code on a 2012 Nissan Sentra?

- The cost of repairing the U0140 code can vary depending on the specific issue, parts needed for replacement, and labor costs at a dealership or repair shop.

10. How can I prevent the U0140 code from recurring on my 2012 Nissan Sentra?

- Regular maintenance checks, ensuring proper electrical connections, and addressing any warning signs promptly can help prevent the U0140 code from recurring.

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